# 5. Attester signs up

```bash
npx ts-node cli/index.ts attesterSignUp \
    -x $UNIREP_CONTRACT_ADDRESS  \
    -d $ATTESTER_PRIVATE_KEY
```

{% hint style="info" %}
**NOTE:** `-d` is attester's private key, this private key is to be used only by this attester hereafter

See: [cli/attesterSignUp](https://unirep.gitbook.io/unirep/package/cli/user-sign-up#attestersignup) for more `attesterSignUp` options.
{% endhint %}

* The attester ID will be printed, for example

```bash
Attester sign up with attester id: 1
```

Export Attester Id to the environment:

```bash
export ATTESTER_ID=1
```


---

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